Aggregator
iocitfrfcry restoration failed
IOC MAC address change
Downtime Incident CREATED: Apparent Power Blip Trips MBSY1C
BSY1C Dipole dropped on power blip, not accepting command to turn on
FSD Masking Tool: Successful System UN-Masking for: BeamLossMonitor ***Some node's masks failed to write
User: bbarker
Areas: All
BeamLossMonitor Devices:
ILM0I07
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R04
ILM0R06
ILM0R08
ILM0R09
ILM1L01
ILM1L02
ILM6R08
ILM3S00
ILM7S00
ILM9S00
ILM5S10
ILM5E03
ILM7S01
ILM9A01
ILM3E02
ILM5A01
ILM1A04
ILM1A06
ILM1A09
ILM5A10
ILM1A16
ILM1A19
ILM3R10
ILM9R07
ILM1R09
ILM2L03
ILM5R10
ILM5R05
ILM2L01
ILM2T09
ILM
CHL Operations caused CEBAF systems to trip?
Suddenly recieved a bunch of Facilities power alarms which cleared instantly.
0L04 and 1L10-3 dropped RF and BSY1C Box supply dropped.
The RF and Box supply drop coincides at the exact same time a CHL power meter (08-CHL 1-MCC) jumps up ~ 800 kW. This is also seen on the 33 MVA substation.
BSY1C is not coming back. We need to contact DC power.
RF cavities restored without issue.
FSD Masking Tool: Successful System Masking for: BeamLossMonitor ***Some node's masks failed to write
User: bbarker
Areas: All
BeamLossMonitor Devices:
ILM0I07
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R04
ILM0R06
ILM0R08
ILM0R09
ILM1L01
ILM1L02
ILM6R08
ILM3S00
ILM7S00
ILM9S00
ILM5S10
ILM5E03
ILM7S01
ILM9A01
ILM3E02
ILM5A01
ILM1A04
ILM1A06
ILM1A09
ILM5A10
ILM1A16
ILM1A19
ILM3R10
ILM9R07
ILM1R09
ILM2L03
ILM5R10
ILM5R05
ILM2L01
ILM2T09
ILM8T0
PARTIALLY COMPLETED Investigate "beam dragging" around IHA0L03
Sorry Shawn, wrote an ELOG/POLOG yesterday, https://logbooks.jlab.org/entry/4363743
Yes, while very likely grounded the VEP would benefit from an improved connector; the grounding foil has the feel of HVAC tape, very self-sticky and at least on the outside non-conductive. It's a common mistake to think that any shiny metallized surface is conductive, e.g. 80/20 used in many places at the lab can have a non-conductive coatings, just like painted metal. Using bonded ground points and star grounding patterns to the main ground line to avoid ground loops is preferred.
NE spreader scraping
Follow-up Re: Looking at vacuum/rf trip correlation
Checking on the ion pumps current in the chopper region. Since yesterday's adjustment of ion pump supply voltage, seems like the burps did not disappear. Longer time frame data will help us to conclude on the vacuum/rf trip correlation before and after the ion pump supply voltage adjustment.
Beam on 1C12 SLM
Hall B BOM & Downstream Halo trip points adjusted, anomalous BOM readback
Hall A FFB Running, Absolute mode, RF Off
FFB runs well with just the orbit, but as soon as we turn on RF it trips the hall ion chambers. I failed to snag a picture when the calibration data popped up, but we saw a fair amount of vertical response to the energy lock. For now we will continue to run the position lock with RF off, and turn it off if the hall requests.
"Hall B current to 300 nA"
QuickPic - Hall A Current Increase: 10uA CW -> Loop 1 Target
QuickPic - Hall B Current Increase: 250nA CW -> He Target
FSD Masking Tool: Successful System UN-Masking for: BeamLossMonitor ***Some node's masks failed to write
User: mock
Areas: All
BeamLossMonitor Devices:
ILM0I07
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R04
ILM0R06
ILM0R08
ILM0R09
ILM1L01
ILM1L02
ILM6R08
ILM3S00
ILM7S00
ILM9S00
ILM5S10
ILM5E03
ILM7S01
ILM9A01
ILM3E02
ILM5A01
ILM1A04
ILM1A06
ILM1A09
ILM5A10
ILM1A16
ILM1A19
ILM3R10
ILM9R07
ILM1R09
ILM2L03
ILM5R10
ILM5R05
ILM2L01
ILM2T09
ILM8T0
FSD Masking Tool: Successful System Masking for: BeamLossMonitor ***Some node's masks failed to write
User: mock
Areas: All
BeamLossMonitor Devices:
ILM0I07
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R04
ILM0R06
ILM0R08
ILM0R09
ILM1L01
ILM1L02
ILM6R08
ILM3S00
ILM7S00
ILM9S00
ILM5S10
ILM5E03
ILM7S01
ILM9A01
ILM3E02
ILM5A01
ILM1A04
ILM1A06
ILM1A09
ILM5A10
ILM1A16
ILM1A19
ILM3R10
ILM9R07
ILM1R09
ILM2L03
ILM5R10
ILM5R05
ILM2L01
ILM2T09
ILM8T09<B
Hall A FFB Restoration Procedure Complete, Operating in Absolute Mode with RF and FF off
After much confusion trying to obtain a comprehensible calibration response, FFB for Hall A is online and working.
Fig 1: Initial Orbit to A
Fig 2-3: FFB Calibration Response Curves. Correctors 4H and 2V were chosen for IPM1C07, and 7H and 7V were chosen for IPM1C16
Fig 4: Zeroed horizontal and vertical orbit to IPM1C07 and IPM1C16 with correctors 1C04H, 1C07H, 1C02V, and 1C07V, and zeroed IPM1C12H by removing 0.9 MV/m from 2L20-3
Fig 5: FFB on in absolute mode.